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- W4386905353 abstract "The present work introduces a concept of pumped thermal energy storage based on the Stirling cycle. It provides a smaller sized energy storage and power conversion unit than what is typically proposed using pumped thermal energy storage systems, while offering high round-trip efficiencies despite a simple concept. Conventional systems are typically Brayton cycle based with two-tank liquid thermal storages on both the hot and the cold side. The proposed concept utilizes a single Stirling machine for both energy discharge and charge, and this is the first study where this approach is investigated. It is combined with a single-tank liquid thermal storage on the hot side and a fan and radiator combination on the cold side. Round-trip efficiencies for several storage fluids are analyzed using high-fidelity validated models, with relevant components and power losses. It is shown that round-trip efficiencies of up to 49 % at the generator are possible when using high-temperature fluids and with low-temperature synthetic fluids round-trip efficiencies of 32 % are obtained." @default.
- W4386905353 created "2023-09-21" @default.
- W4386905353 creator A5016808355 @default.
- W4386905353 date "2023-12-01" @default.
- W4386905353 modified "2023-09-27" @default.
- W4386905353 title "Simplified pumped thermal energy storage using a two-way Stirling cycle" @default.
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- W4386905353 doi "https://doi.org/10.1016/j.est.2023.108994" @default.
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